An Investigation on the Adsorption Behavior of a Mesoporous Silica Synthesized by a Surfactant-assisted Method in an Acidic Media

Mesoporous SiO۲ nanopowder was synthesized under an acidic condition by a sol-gel method using various amounts of cetyltrimethyl ammonium bromide (CTAB) as structure directing agent. The samples were investigated with XRD, SEM, FTIR, TEM and N۲ absorption-desorption analysis. Also, the incremental effect of surfactant were examined. The results obtained from the analysis suggested that an increase in the amount of surfactant resulted in increasing specific surface area, pore size and pore volume, of the synthesized particles up to ۵۴۹ m۲.g-۱, ۱۷.۳ nm, and ۲ cm۳.g-۱, respectively. Absorption behavior of the mesoporous silica was investigated for degradation of methylene blue pigments (MB) in aqueous solutions. The samples SC۰, SC۰.۵ and SC۱ showed the maximum absorption capacities of ۳۳۳, ۴۵۴ and ۵۲۶ mg/g, respectively

کلیدواژه ها:

Mesoporous silica ، Sol-gel ، Absorption ، Methylene blue.